Apparatus for correcting mis-convergence and geometric distortion in deflection yoke using variable resistance

Abstract

The present invention relates to a deflection yoke, and in particular, to an apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, proving a more convenient way to adjust VCR by adjusting the current flowing in a comma-free coil using a variable resistance, instead of attaching a magnetic member as in the conventional method for the products associated with VCR (Vertial Green) properties.

What is claimed is:  
     
       1. An apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, the apparatus comprising: 
       a conical-shaped coil separator including a neck portion and a screen section;  
       an upper horizontal deflection coil and a lower horizontal deflection coil installed to be electrically connected to each other at an upper and lower portions of inner periphery of the screen portion in the coil separator;  
       a left vertical deflection coil and a right vertical deflection coil installed to be electrically connected to each other at an upper and lower portions of outer periphery of the screen portion in the coil separator;  
       a conical-shaped ferrite core installed at outer periphery of the screen portion in the coil separator to enhance a magnetic field of the vertical deflection coil;  
       a plurality of comma-free coils installed at the neck portion of the coil separator to be electrically connected to the vertical deflection coil for generating a pin-cushion magnetic field, thereby canceling a barrel magnetic field generated by the left and right vertical deflection coils;  
       a distortion adjusting portion for correcting geometric distortion on a screen by adjusting a relative current flowing in the left and right vertical deflection coils and thereby, adjusting a relative magnetic field in the left and right sides;  
       a first convergence adjusting portion for correcting a vertical mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the middle left portion and the middle right portion and thereby, adjusting a relative magnetic field in the left and right sides;  
       a second convergence adjusting portion for correcting a horizontal mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the upper portion and the lower portion and thereby, adjusting a relative magnetic field in the upper and lower sides; and  
       a vertical center raster mis-convergence adjusting portion, comprising variable resistance connected to the comma-free coils in parallel, and fixed resistance connected to a common contact point of the left and right comma-free coils and a moving electrode of the variable resistance.  
     
     
       2. The apparatus of  claim 1 , wherein the variable resistance in the vertical center raster mis-convergence adjusting portion is in a range of from 5 to 10Ω. 
     
     
       3. An apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, the apparatus comprising: 
       a conical-shaped coil separator including a neck portion and a screen section;  
       an upper horizontal deflection coil and a lower horizontal deflection coil installed to be electrically connected to each other at an upper and lower portions of inner periphery of the screen portion in the coil separator;  
       a left vertical deflection coil and a right vertical deflection coil installed to be electrically connected to each other at an upper and lower portions of outer periphery of the screen portion in the coil separator;  
       a conical-shaped ferrite core installed at outer periphery of the screen portion in the coil separator to enhance a magnetic field of the vertical deflection coil;  
       a plurality of comma-free coils installed at the neck portion of the coil separator to be electrically connected to the vertical deflection coil for generating a pin-cushion magnetic field, thereby canceling a barrel magnetic field generated by the left and right vertical deflection coils;  
       a first convergence adjusting portion for correcting a vertical mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the middle left portion and the middle right portion and thereby, adjusting a relative magnetic field in the left and right sides; and  
       a vertical center raster mis-convergence adjusting portion, comprising variable resistance connected to the comma-free coils in parallel, and fixed resistance connected to a common contact point of the left and right comma-free coils and a moving electrode of the variable resistance.  
     
     
       4. The apparatus of  claim 3 , wherein the variable resistance connected to the comma-free coils in parallel, and fixed resistance connected to a common contact point of the left and right comma-free coils and a moving electrode of the variable resistance. 
     
     
       5. An apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, the apparatus comprising: 
       conical-shaped coil separator including a neck portion and a screen section;  
       an upper horizontal deflection coil and a lower horizontal deflection coil installed to be electrically connected to each other at an upper and lower portions of inner periphery of the screen portion in the coil separator;  
       a left vertical deflection coil and a right vertical deflection coil installed to be electrically connected to each other at an upper and lower portions of outer periphery of the screen portion in the coil separator;  
       a conical-shaped ferrite core installed at outer periphery of the screen portion in the coil separator to enhance a magnetic field of the vertical deflection coil;  
       a plurality of comma-free coils installed at the neck portion of the coil separator to be electrically connected to the vertical deflection coil for generating a pin-cushion magnetic field, thereby canceling a barrel magnetic field generated by the left and right vertical deflection coils;  
       a distortion adjusting portion for correcting geometric distortion on a screen by adjusting a relative current flowing in the left and right vertical deflection coils and thereby, adjusting a relative magnetic field in the left and right sides;  
       a first convergence adjusting portion for correcting a vertical mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the middle left portion and the middle right portion and thereby, adjusting a relative magnetic field in the left and right sides; and  
       a vertical center raster mis-convergence adjusting portion, comprising variable resistance connected to the comma-free coils in parallel, and fixed resistance connected to a common contact point of the left and right comma-free coils and a moving electrode of the variable resistance.  
     
     
       6. The apparatus of  claim 5 , wherein the variable resistance in the vertical center raster is in a range of from 5 to 10Ω. 
     
     
       7. An apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, the apparatus comprising: 
       a conical-shaped coil separator including a neck portion and a screen section;  
       an upper horizontal deflection coil and a lower horizontal deflection coil installed to be electrically connected to each other at an upper and lower portions of inner periphery of the screen portion in the coil separator;  
       a conical-shaped ferrite core installed at outer periphery of the screen portion in the coil separator to enhance a magnetic field of the vertical deflection coil;  
       upper and lower left vertical deflection coils and upper and lower right vertical deflection coils wound around the ferrite core to be electrically connected for generating vertical deflection magnetic fields at the upper and lower portions;  
       a plurality of comma-free coils installed at the neck portion of the coil separator to be electrically connected to the vertical deflection coil for generating a pin-cushion magnetic field, thereby canceling a barrel magnetic field generated by the left and right vertical deflection coils;  
       a first convergence adjusting portion for correcting a vertical mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the middle left portion and the middle right portion and thereby, adjusting a relative magnetic field in the left and right sides; and  
       a vertical center raster mis-convergence adjusting portion, comprising variable resistance connected to the comma-free coils in parallel, and fixed resistance connected to a common contact point of the left and right comma-free coils and a moving electrode of the variable resistance.  
     
     
       8. The apparatus of  claim 7 , wherein the variable resistance in the vertical center raster is in a range of from 5 to 10Ω. 
     
     
       9. An apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, the apparatus comprising: 
       a conical-shaped coil separator including a neck portion and a screen section;  
       an upper horizontal deflection coil and a lower horizontal deflection coil installed to be electrically connected to each other at an upper and lower portions of inner periphery of the screen portion in the coil separator;  
       a left vertical deflection coil and a right vertical deflection coil installed to be electrically connected to each other at an upper and lower portions of outer periphery of the screen portion in the coil separator;  
       a conical-shaped ferrite core installed at outer periphery of the screen portion in the coil separator to enhance a magnetic field of the vertical deflection coil;  
       a plurality of comma-free coils installed at the neck portion of the coil separator to be electrically connected to the vertical deflection coil for generating a pin-cushion magnetic field, thereby canceling a barrel magnetic field generated by the left and right vertical deflection coils;  
       a distortion adjusting portion for correcting geometric distortion on a screen by adjusting a relative current flowing in the left and right vertical deflection coils and thereby, adjusting a relative magnetic field in the left and right sides;  
       a first convergence adjusting portion for correcting a vertical mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the middle left portion and the middle right portion and thereby, adjusting a relative magnetic field in the left and right sides;  
       a second convergence adjusting portion for correcting a horizontal mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the upper portion and the lower portion and thereby, adjusting a relative magnetic field in the upper and lower sides; and  
       a vertical center raster mis-convergence adjusting portion, comprising a first current adjusting resistance having one end connected to a contact point of a right vertical deflection coil and a left comma-free coil; a second current adjusting resistance having one end connected to a contact point of a right comma-free coil and a power supply source; a variable resistance connected to a common contact point of the left and right comma-free coils and a moving electrode of the variable resistance, having one end connected to the other end of the first current adjusting resistance and another end connected to the other end of the second current adjusting resistance.  
     
     
       10. The apparatus of  claim 9 , wherein the variable resistance in the vertical center raster is in a range of from 5 to 10Ω. 
     
     
       11. An apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, the apparatus comprising: 
       a conical-shaped coil separator including a neck portion and a screen section;  
       an upper horizontal deflection coil and a lower horizontal deflection coil installed to be electrically connected to each other at an upper and lower portions of inner periphery of the screen portion in the coil separator;  
       a left vertical deflection coil and a right vertical deflection coil installed to be electrically connected to each other at an upper and lower portions of outer periphery of the screen portion in the coil separator;  
       a conical-shaped ferrite core installed at outer periphery of the screen portion in the coil separator to enhance a magnetic field of the vertical deflection coil;  
       a plurality of comma-free coils installed at the neck portion of the coil separator to be electrically connected to the vertical deflection coil for generating a pin-cushion magnetic field, thereby canceling a barrel magnetic field generated by the left and right vertical deflection coils;  
       a first convergence adjusting portion for correcting a vertical mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the middle left portion and the middle right portion and thereby, adjusting a relative magnetic field in the left and right sides; and  
       a vertical center raster mis-convergence adjusting portion, comprising a first current adjusting resistance having one end connected to a contact point of a right vertical deflection coil and a left comma-free coil; a second current adjusting resistance having one end connected to a contact point of a right comma-free coil and a power supply source; a variable resistance connected to a common contact point of the left and right comma-free coils and a moving electrode of the variable resistance, having one end connected to the other end of the first current adjusting resistance and another end connected to the other end of the second current adjusting resistance.  
     
     
       12. The apparatus of  claim 11 , wherein the variable resistance in the vertical center raster is in a range of from 5 to 10Ω. 
     
     
       13. An apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, the apparatus comprising: 
       a conical-shaped coil separator including a neck portion and a screen section;  
       an upper horizontal deflection coil and a lower horizontal deflection coil installed to be electrically connected to each other at an upper and lower portions of inner periphery of the screen portion in the coil separator;  
       a left vertical deflection coil and a right vertical deflection coil installed to be electrically connected to each other at an upper and lower portions of outer periphery of the screen portion in the coil separator;  
       a conical-shaped ferrite core installed at outer periphery of the screen portion in the coil separator to enhance a magnetic field of the vertical deflection coil;  
       a plurality of comma-free coils installed at the neck portion of the coil separator to be electrically connected to the vertical deflection coil for generating a pin-cushion magnetic field, thereby canceling a barrel magnetic field generated by the left and right vertical deflection coils;  
       a distortion adjusting portion for correcting geometric distortion on a screen by adjusting a relative current flowing in the left and right vertical deflection coils and thereby, adjusting a relative magnetic field in the left and right sides;  
       a first convergence adjusting portion for correcting a vertical mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the middle left portion and the middle right portion and thereby, adjusting a relative magnetic field in the left and right sides; and  
       a vertical center raster mis-convergence adjusting portion, comprising a first current adjusting resistance having one end connected to a contact point of a right vertical deflection coil and a left comma-free coil; a second current adjusting resistance having one end connected to a contact point of a right comma-free coil and a power supply source; a variable resistance connected to a common contact point of the left and right comma-free coils and a moving electrode of the variable resistance, having one end connected to the other end of the first current adjusting resistance and another end connected to the other end of the second current adjusting resistance.  
     
     
       14. The apparatus of  claim 13 , wherein the variable resistance in the vertical center raster is in a range of from 5 to 10Ω. 
     
     
       15. An apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, the apparatus comprising: 
       a conical-shaped coil separator including a neck portion and a screen section;  
       an upper horizontal deflection coil and a lower horizontal deflection coil installed to be electrically connected to each other at an upper and lower portions of inner periphery of the screen portion in the coil separator;  
       a conical-shaped ferrite core installed at outer periphery of the screen portion in the coil separator to enhance a magnetic field of the vertical deflection coil;  
       upper and lower left vertical deflection coils and upper and lower right vertical deflection coils wound around the ferrite core to be electrically connected for generating vertical deflection magnetic fields at the upper and lower portions;  
       a plurality of comma-free coils installed at the neck portion of the coil separator to be electrically connected to the vertical deflection coil for generating a pin-cushion magnetic field, thereby canceling a barrel magnetic field generated by the left and right vertical deflection coils;  
       a first convergence adjusting portion for correcting a vertical mis-convergence on a screen by adjusting a relative current flowing in the comma-free coils at the middle left portion and the middle right portion and thereby, adjusting a relative magnetic field in the left and right sides; and  
       a vertical center raster mis-convergence adjusting portion, comprising a first current adjusting resistance having one end connected to a contact point of a right vertical deflection coil and a left comma-free coil; a second current adjusting resistance having one end connected to a contact point of a right comma-free coil and a power supply source; a variable resistance connected to a common contact point of the left and right comma-free coils and a moving electrode of the variable resistance, having one end connected to the other end of the first current adjusting resistance and another end connected to the other end of the second current adjusting resistance.  
     
     
       16. The apparatus of  claim 15 , wherein the variable resistance in the vertical center raster is in a range of from 5 to 10Ω.